Presser-foot for sewing-machines.



No. 725,929 PATENTED APR 21, 1903..

D. L. CHANDLER. DRESSER FOOT FOR SEWING MACHINES.

APPLICATION FILED JAN. 24, 1902.

N0 MODEL.

WIT'N E 5555.-

UNrra States ATENT Triton.

DANIEL L. CHANDLER, OF AYER, MASSACHUSETTS, ASSIGNOR TO GEORGE J. BURNS,OF AYER, MASSACHUSETTS.

PRESSER-FOOT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 725,929, dated April21, 1903.

Application filed January 24, 1902. Serial No. 91,091. No model-3 I Towhom, it may concern: to receive the presser 7. A fiat spring 9, at-Beitknown thatLDANIELL.OHANDLER,0f tached by a screw 10 to thepresser-foot, Ayer, in the county of Middlesex and State of yieldinglydepresses the free rear end of the Massachusettahaveinventedcertain'newand presser 7 into coaction with the work-plate 1, 5 5 usefulImprovements in Sewing-Machines, of and a pair of projections 11 11 onthe presser which the following is a specification. act as stops, inconjunction with the upper This invention relates to sewing-machines;surface of the presser-foot, to limit the and it consists in certainimprovements amount of depression of said free'end. The therein,whichIshall now proceed to describe spring 9 also by overlying thehinge-line of 60 and claim. the presser 7 retains the trunnions of theOf the accompanying drawings, Figure 1 latter in their open bearings.represents a vertical sectional view of sew- It will be noted that theneedle-passage 5 is ing-machine plaiter parts constructed in acformedpartly in the presser-foot 3 and partly cordance with myinvention.Fig.2r'epresents in the secondary presser 7. The free end of 65 aplanview of the presser-foot. Fig. 3 reprethe latter bears on the fabric onboth sides of sents a section on the line 3 3 of Fig. 1 with the line ofstitching in immediate proximity the plaiting-blades omitted. Fig. &repreto the needle-path and can move vertically sents a detailperspective view of the secondvWithin limits independently of thevertical ary presser. Fig. 5 represents a perspective movement of themain presser-foot. 7o view showing an example of the character of InFig. 5, 12 represents a piece of ruching, work upon which the machine isdesigned to having groups of knife-plaits 13 13 formed in operate. it,each group consisting of a plurality of The same reference charactersindicate the plaits formed in one direction and a pluralsame parts inall the figures. ity of succeeding plaits formed in the oppo- 25 Myinvention, of which a preferred embodisite direction, the plaits beingsecured by a ment is illustrated in the drawings, consists, longitudinalline of stitching 14:. In making generally speaking, in a mechanism forpressruchin g of this or similar character with maing on the fabric inthe immediate vicinity chines as constructed prior to my invention ofthe needle in the manner more fully hereit is found that thefirst-formed plaits of a o inafter specified by means movable indegroupwill so raise the presser-foot of the mapendently of the movement of themain chine that'the fabric following them will not presser-foot. bepressed firmly against the work-plate.

lrepresents the work-plate, through which Therefore when the needleretreats after operates a feeder composed of'a row or series piercingthe goods it draws the goods up with of toothed bars 2 2, acting throughslots in it, which in turn pulls up the thread and prethe work-plate.vents the loop from being properly formed.

3 represents the yielding presser-foot co- The hook or under part of thestitching mechacting in the ordinary manner with the feeder anismtherefore often fails to act properly, and work-plate. which results inthe formation of an imperfect 40 4 represents the needle, operatingthrough or unlocked stitch. \Vith my improvement,

a needle-passage 5 in the presser mechanism, however, the auxiliarypresser 7, because of its and 6 6 represent plaiting-blades acting toindependent movement and the location of its form plaits in the fabric,which are subjectfree end in advance of the rear portion of the ed topressure between the presser mechanmain presser-foot, remains with itssaid free ism and the work-plate,'are stitched by the end depressedbelow the main presser-foot stitching mechanism, and are fed forward bywhen thelatter is elevated by abunch of plaits the feeder. under itsrear portion, and accordingly holds 7 is a secondary presser formed withtrunthe fabric in the immediate vicinity of the nions or pivots 8 S,jour-naled in open-bearing needle under firm pressure at all times. It odepressions in the presser-foot 3, in which is essential to this actionthat the auxiliary latter is cut a rectangular aperture adapted pressershall not extend for any substantial distance in the rear of the lateralplane through the needle, for in that case the bunch of plaits in therear of the needle which lifts the presser-foot would also lift theauxiliary presser to substantially the same level. It is, furthermore,highly desirable to the proper working of the invention that theauxiliary presser should be of narrow width compared to thepresser-foot, for then the auxiliary presser causes but little drag onthe goods and is not raised by thick portions or irregularities whichmay exist in the margins of the goods.

It is obvious that this improvement is 1 equally eifective for variousother classes of goods having an irregular or seamed formal tion, inwhich hold the the goods.

In sewingmachines as ordinarily constructed the stitching andwork-feeding parts 1 form a combination in which the presser-footperforms the dual function of holding the Work against the feeder whenthe latter acts r and of holding the Work against the workplate when thestitch is being formed. Thisv combination I have changed by dividing upthe feeding and work-holding functions of the 1 pressing means andassigning them to independently-movable elements. In sewing-machineplaiters as formerly constructed there is a further combination betweenthe workplate, the presser-foot, the stitch -forming' mechanism, and theplaiting or folding mechanism which I have altered by dividing up thefunctions of the work-pressing means between two independently-movableelements, one of which acts to hold the formed plaits under pressure,while the other acts independently to hold the goods in the vicinity ofthe needle under pressure whilethe plaits are being stitched.

claim 1. In a sewing-machine the combination with the main yieldingpresser, work-plate, feeder, needle, and plaiterblade operating betweensaid main presser and work-plate, of an auxiliary yielding presser ofsmall width compared to that of the main presser and pivoted theretoforward of the lateral plane through the needle, its rear endterminating substantially at said plane.

2. A presser device for sewing-machines comprising a main presser formedon its up per sidewith open trunnion-bearings and with i an aperturebetween said bearings, an auxiliary presser occupying said aperture andhaving trunnions mounted in said bearings, means to limit the downwardmovement of the free end of said auxiliary presser with respect to themain presser, and a spring attached to the main presser and extendingover the hinge-line of the auxiliary presser to a bearing on the latter,whereby the auxiliary presser is retained in its bearings and its freeend yielding-1y depressed.

In testimony whereof I have affixed my signature in presence of twowitnesses.

DANIEL L. CHANDLER. Witnesses:

THOMAS L. HAZEN,

P. H. HOOLEY.

